Dealing damage by a Halfling rogue

3.5 Edition Rules:

My Halfling rogue long envied the amount of damage her fellow party members could deliver to opponents.  Her small hand crossbow, while convenient and light-weight, delivers only a d3 of damage sans modifiers.  Though it gives her range and keeps her out of the thick of the battle, she rarely catches the enemy flat-footed and thus cannot apply her sneak-attack damage.  Recently, that all turned around when she acquired a ring of invisibility.  Being invisible, her enemies are denied their dexterity bonus to AC, thus making them vulnerable to sneak attack damage.  She also has taken the crossbow sniper feat which allows her to perform sneak attacks from 60' instead of just 30'. 

Bottom line:  being invisible is very good for ranged sneak-attacks from rogues.